Digitus 



diplo 



from the summit of the main 

 petiole, straight ribbed; Digltus, 

 a measure of about 3 inches in 

 length, or 8 cm. ; digita'lis, a finger- 

 length. 



dig'onous (5ts, two, yuvia, an angle), 

 two-angled, as the stems of some 

 cacti (Crozier) ; Digynla (yvrf, a 

 woman), a Linnean class, with a 

 gynaecium of two pistils; digynlan, 

 dig'ynous, with two separated styles 

 or carpels. 



dilacera'tus (Lat.), torn asunder, 

 lacerated. 



Dilamina'tion (dis, apart, lamina, a 

 thin plate), the separation of a 

 layer from a petal, like or unlike it 

 in form ; chorisis. 



dila'ted, dila'tus (Lat., widened), ex- 

 panding into a blade, as though 

 flattened, like the filaments of 

 Omithogalum. 



dilep'idus J (Sis, two, Xeirls, XeTrtfos, 

 scale), consisting of two scales. 



dilu'tus (Lat. thinned) of a pale tint. 



dimerlc, dim'erous, -rus(ls,two, yuepds, 

 a share), with two members in each 

 part or circle. 



dimid'iate, dimidia'tus (Lat., halved), 

 (1) halved, as when half an organ 

 is so much smaller than the other, 

 as to seem wanting ; (2) used of the 

 calyptra of Mosses when split on 

 one side by the growth of the 

 theca ; dimldia'to-corda'tus, when 

 the larger half of a dimidiate leaf 

 is cordate. 



dimorphic, dimorph'ous (52s, twice, 

 /Aop^rj, shape), occurring under two 

 forms ; Dimorphism, the state of 

 presenting two forms, as long or 

 short- sty led flowers in the same 

 species. 



dimo'tus (Lat., separated), somewhat 

 remote from. 



Diodanglum (5to5os, a passage, Ayyeiov, 

 a vessel), Van Tieghem's term for 

 sporangium inVascular Cryptogams 

 and Bryophytes. 



Di'ode (Siodos, a passage), Van Tieg- 

 hem's term for a reproductive body 

 peculiar to vascular plants which 

 develops into a rudimentary body 



or prothallium, the transition be- 

 tween the rudimentary and adult 

 stages; cf. ISODIODY, HETERO- 

 DIODY ; Di'odogone (701/77, offspring), 

 Van Tieghem's term for a sporan- 

 gium which produces diodes in 

 Phanerogams, the embryo sac and 

 pollen sac ; Di'odophytes (0irr6v, a 

 plant), vascular plants (Van Tieg- 

 hem). 



Dioe'cia(51s, two, ou-os, a house), a Lin- 

 nean class of plants with unisexual 

 flowers; dioec'ian, dioecious, uni- 

 sexual, the male and female ele- 

 ments in different individuals ; 

 dioec'io dimorph'ous, heterogonous; 

 dioeclo - polygamous, when some 

 individuals bear unisexual flowers, 

 and others hermaphrodite ones ; 

 Dioeclsm, the condition of being 

 dioecious ; dioi'cous, a spelling used 

 by bryologists for DIOECIOUS, the 

 male and female organs on separate 

 plants. 



dioph'anus = DIAPHANOUS. 



Di'osmose, Diosmo'sis (5iA, through, 

 cD<r/ios, a pushing), the transfusion 

 of liquid through membrane. 



dipet'alous, -us (5is, two, irtraKov, a 

 flower-leaf), having two petals ; 

 diphyll'ous, -MS (<pij\\ov, a leaf), 

 having two leaves ; diplanetlc 

 (jrXdvos, roaming), relating to Di- 

 PLANETISM; Diplan'etism, double- 

 swarming ; in certain genera allied 

 to Saprolegnia the zoospores escape 

 from their sporangium destitute of 

 cilia, come to rest in a cluster each 

 forming a cell-wall, and after some 

 hours the protoplasmic contents of 

 each spore escapes, acquires cilia 

 and active movement. 



Diplecolo'beae (5ts, twice, ir\tKw, I 

 fold, Xo/3os, a lobe), a sub-order of 

 Cruciferae, the incurved cotyledons 

 being twice folded transversely ; 

 Dipleurogen'esis (ir\evpa, the side, 

 yeveffis, beginning), term used by 

 L. H. Bailey for Bilaterality, as 

 the type of animals ; cf. CENTBO- 



GENESIS. 



diplo (dtn-Xoos, twofold), in composi- 

 tion =duplo. 



78 



